CA1311468C - Portable concrete mixer - Google Patents
Portable concrete mixerInfo
- Publication number
- CA1311468C CA1311468C CA000604188A CA604188A CA1311468C CA 1311468 C CA1311468 C CA 1311468C CA 000604188 A CA000604188 A CA 000604188A CA 604188 A CA604188 A CA 604188A CA 1311468 C CA1311468 C CA 1311468C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- concrete
- mixing
- frame
- trailer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/18—Mixing in containers to which motion is imparted to effect the mixing
- B28C5/1806—Mixing in containers to which motion is imparted to effect the mixing rotating about an inclined axis
- B28C5/1818—Mobile or portable devices, e.g. on a wheelbarrow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
ABSTRACT
A trailer for transporting and mixing concrete or similar products, comprising a wheeled frame and a mixing drum mounted to the wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from the drum. A unidirectional driving connection is provided between a wheel of the frame and the mixing drum for rotating the drum in the concrete mixing direction as a result of movement of the wheeled frame. An electric motor is also provided on the frame for rotating the drum in the concrete discharging direction.
A trailer for transporting and mixing concrete or similar products, comprising a wheeled frame and a mixing drum mounted to the wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from the drum. A unidirectional driving connection is provided between a wheel of the frame and the mixing drum for rotating the drum in the concrete mixing direction as a result of movement of the wheeled frame. An electric motor is also provided on the frame for rotating the drum in the concrete discharging direction.
Description
lL3~46~, -- 1 ~
TITLE: _PORTABL~_CONCRErrE MIXER
F ELD OF THE INVENTION
The present invention relates -to the preparation of concrete or similar materials and, more particularly, to a portable apparatus for transporting and mixing concrete well suited for small jobs.
BACKGROUMD _F TH~ INVENTI~N
The mos-t popular method for transporting and mixing concrete consists of employing large cement trucks adapted to carry and mix subtantial quantities of concrete in the most efiicient manner. However, this type of equipment is ill suited for small concrete jobs which are normally carried out by mixing the concrete at the job site e:ither manually or by portable mixers. This process is time consuming because the transport of the cement from the supplier to the job site and the cement mixing operations are performed separately.
Another method to obtain concre~e for small applications is to rent a speclally designed trailer which is filIed with concrete mix at the plant and towed ko the ~5 construction site. The major problem with thls system is that once the trailer has been filled with concrete, the transportatiorl and the pouriny operations mu~t be performed rapidly before the concrete hardens. Thus, as a result of an unexpected delay duriny the transportation~
; 30 the concrete mix may not longer be usable when arriving at the job site and trailer cIeaning problems may arrise.
~.
~ 3 ~
- ~ .
O~JECTS_AND_STAT~MENT_OF_THF INVENTION
An ohject of the inven~ion is to provide a portable concrete mixing and transporta~ion device -that is both 5efficient and inexpensive to build.
Another object of the invention is a portable unit for transporting and mixing eoncreke ~Jith provisions to automatically discharge the concrete mix.
A further object of the invention is a trailer for 10transpor~ing and mixing concrete with provisions to prevent accidental concrete discharge as a result of changing ~he direction of rnovement of the trai:Ler.
The above objects are achieved by providing a trailer to be towed ~y a suitable vehicle, comprising a wheeled 15frame and a concrete mixing drum rotatably mounted to the frame. The drum is a generally hollow stru~ture with internal vanes arranged to mix the concrete while ~he drum rotates into one direction, and to discharge the concrete mix when the drum rotates into the opposite direction.
20A unidirectional drivi.ng connection between at least one of the trailer wheels and the mixiny drum causes rotation thereof in a corlcrete mixing clirection while the trailer advances, but prevents the drum to rotate in a concrete discharge direction when the trailer is moved in 25an opposite direction. Thls feature is particularly advantayeous because it permits to avoid accidental eoncrete discharge from the mixing drum when ths trailer is moved back.
To conveniently expel the concrete mix from the 30mixing drum at the construction site, the trailer is provided with a device that will drive the drum into the concrete discharge direction.
In a preferred embodiment, the wheels supporting ~he trailer frame on the ground surface are mounted to a 35common axle which also serves as a power take off for the ' ~3~6~
mixing drum. The opera-tive connection between the mixing drum and the axle is effected by means of a years and drive axles assembly incorporating a suitable ra~chet mechanism to prevent rotation of the mixiny tlrum when the trailer is moved backr but rotating the mix.ing drum when the trailer advances.
To discharye the concrete mix ~rom the drumr an electric motor is provided on the trailer, coupled to the drum through a chain and sprocket assembly, to rotate the latter in a concrete discharge direction.
Therefore, the present invention comprises~ in general terms, a trailer for transportiny and mixing concrete or similar products, comprising:
- a wheeled frame;
- a mixing drum mounted to the wheeled frame for rotation in a concrete mixing direction and in a concrete discharging dlrection;
- a unidirectional driving connection between a wheel of the frame and the mixing drum to cause rota~ion of the mixing drum solely in the concrete mixing direction as a result of movement of the wheeled frame; and - selectively actuakable driving means on the ~rame in operative relationshlp with the mix.ing drum for rotating the mixing drum in the drum di.sc!harcJing direction.
Other advantages and objects of the invention will become clear from the foll.owing description of ~ pre~erred embodiment of this invention.
BRI~F DESCRIPTION OF THE DRA~INGS
- Figure 1 is a top eIevational view of a portable concrete mixing and transportation device constructed in accordance with the invention;
~ 3 ~
- Figure 2 is a side elevational view, partly seetional of the concrete mixing device;
- Figure 3 is a bottom view of the concrete mixing device;
- Figure 4 is an enlarged perspective view of a ratchet mechanism used with the device in accordance with the invention;
- Figure 5 is a side eleva~ional view of the ratchet mechanism shown in Figure 4;
- Figure 6 is a cross-sectional view taken along lines 6-6 in Figure 5; and - Figure 7 is a perspective view of a hitch unit and levelling mechanism for the concrete mixing and transportation device~
DESCRIPTION OF A PR~FERRED EMBODIMENT
Referring now to the annexed drawings and, more particularly, to Figures 1, 2 and 3, the reference numeral 10 designates in general a portahle concrete mixing trailer designed to be towed by a car or any other suitable vehicle. The device 10 includes a frame 12 constructed from metallic beams welded or otherwise attached to each other. The frame 12 is supported on the ground by a pair of rubber tired wheels 14 moun~ed for rotation on a common axle 16. The axle 16 ls mounted to the metallic frame 1? by a leaf spriny suspension 18.
A concrete mixing drum 20 of a generally conventional construction is mounted on ~he frame 12. The drum 20 is a generally hollow cylindrical structurq wlth internal mixing vanes 22 extending spirally along the longitudinal axis of the drum.
A supportiny structure 24 is mounted at the rear of the frame 12 for holding the drum 20 at an angle with respect to the horizontal position. More particularly, :
~3~6~
the supporting structure 24 includes an upwardly extending post 26, secured to the frame 12 by means of a bracket 28, and carrying at its upper end a pair of rollers 29 (only one being shown) engaging the surface of the clrum 20 to the frame 12.
If desired, a concrete discharging chute may be provided (not-shown) on the frame 12, below the mouth of the drum 20.
The drum 20 is driven from the wheels 14 by a transmission 30 including an input shaft 32 interconnecti.ng the axle assembly 16 and a transfer case 34. From the trans~er case 34 extends an output shaft 36 connected to the drum 20. The shaft 36 incorporates a ratchet mechanism 38 to enable a uni-directional power transfer as it will be described hereinafter.
The connections between the drive shafts 32, 3~, the transfer case 34 and the axle assembly 16 are made means of universal joints covered by rubber boots 40 to ~eal against dirt or other foreign material.
The structure of the ratchet mechanism 38 is best illustrated in Figures 4, 5 and 6.
The ratchet mechanism 38 aomprises a circular plate 42 co-axial to a shaft 43 extending from the transfer case 34. On the plate 42 are provided two cams 44 at spaced locations from each other. Each cam 44 comprises a ramp 46 terminatin~ by an ahu~.ment 48.
A collar 50 is secured to one end of a shaft 52 co-axial with the shaft 43 and leading to the mixing drum 20.
The extremity of the collar 50, faciny the plate ~2, is provided with a socket of a generally ~cylindrical configuration Inot shown) ro~atably receiving a closely conforming pin (not shown) projecting from the plate 42.
This arrangement allows to provide rotatable connec~ion between the collar 50 and the plate 42.
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From the collar 50 project laterally two flanyes 54 and 56 clrilled to slidingly accept a pin 58 receiving a coil spring 60 maintained captive between the flanges 54 and 56. The extremity of the ~oil spring 60 adjacent the flanye 56 is secured by any appropriate means to the pin 5~ so as to urge the same toward the circular plate 42.
The extremity of the pin 58 opposite the plate 42 comprises a locking tab 62 for retracting the pin 58 from its position shown in Figure 4. The two possible pin positions are best illustrated in Figure 5. In full lines, the pin 58 is shown retracted, the locklng tab 62 abutting on the flange 54. In dashed lines, the locking tab 62 is rotated so as to clear the flange 54 allowing the pin to extend closer toward the circular plate 42.
The operation of the ratchet mechanism 38 is as follows. Assuming that the pin 58 is in the position shown in Figure 4 and the driving shaft 44 is rotated in the direction indicated by the arrow 6~, the flat circular plate 42 will rotate with respect to the collar 50 until the abutment 48 on one of the cams 44 engages the pin 58 causing rotation of the collar 50, the shaft 52 and consequently the drum 20 :about its longitudinal axis.
However, if the drive shaft 44 rotates in the opposite direction, as shown by the arrow 66, the pln 58 will engage the cams 44 by the ramps ~6 thereo, which will cause the pin 58 to reciprocate between the flanges 5~ and 56 without rotating the collar 50.
If the locking tab 62 is raised and placed agains~
the flange 54, no driving engagement can be produced : 30 between the circular plate 42 and the:collar 50 regardless of the direction of rotation of the driving shaft 43.
Referring back to ~igures 1 and 2, an electric motor 68 is mounted on the frame 12 to drive the mixing drum 20 for rotation about its longitudinal axis in the dire~tion shown by ~he arrow 70 in Flgure 1, ~o discharge the `
::
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:
. , :
~ 3~6~
~oncre~e mix therefrom. Power transfer from ~he motor ~8 to the drum 20 is carried out through sprockets and a chain assembl~ 69. If desired, a reductor gear may also be used with the mo~or 68 to obtain the desired speed o~
rotation of the drum 20.
To connect the wheeled ~rame 12 to a pulling vehicle, a hitch and leveling assembly 74 is provided. As best illustrated in Figure 7, the assembly 74 comprises an elongated arm 76 pivotally moun~ed to the frame 12 at 78.
A rod 80 treadedly mounted to the frame 12 engages the arm 76 so as to adjust its angular position with respect to the frame 12.
From the arm 76 projects downwardly a supporting member 82 in the form of an angular bracket which engages the ground when the trailer 12 is clisconnected from the vehicle. It will be appreciated that rotating the rod ~0 in the appropriate direction, allows to adjust the anyular position of the frame 12 as desired.
The free extremity of the arm 76 is provided with a hitch unit 84 of conventional construction to effect the connection to the pulling vehicle.
The operation of the device 10 is as follows. The appropriate amount of cement,~ water or other suitahle material, is placed in the drum 20 and the hitch 74 is connected to the pulling vehicle. The vehicle is then driven at normal operating speeds to the job site. During the travel, the rotation of the wheels 14 will drive the mixlng drum 20 in the direction shown by the arrow 64, through the transmission 30, whereby the cement will be mixed and contained in the drum by the vanes 22.
If for whatever reasont the device 10 is moved ba~k, the ratchet 38 will disengage the shaft 52 from khe shaft 43 to prevent rotation of the drum 20 in a concrete discharge direction.
: :
' 13~1~6~
When the trailer is located where desired and the angular position of the frame 12 properly adjusted by means of ~he rod 80, the pi.n 58 of the ratchet me~hanism is placed into a retracted position to preve~t any driving engagement between the drum 20 and the wheels 14, and the electric motor 68 is connected into an electrica:L outlet so as to drive the drum 20 in a concrete discharging direction shown by the arrow 70. It will be appreciated that failure to completely deactivate the ratchet 38 will result into movement of the trailer 10 produced by the electric motor 68 driving the wheels 14 through the transmission normally used to rotate the drum 20.
It is understood that the above description of a preferred embodiment should not be interpretecl in any limiting manner because many variations and refinements are possible without departing from the spirit of the invention. The scope of the invention is defined in the annexed c~aiMs.
. .
:
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:
'
TITLE: _PORTABL~_CONCRErrE MIXER
F ELD OF THE INVENTION
The present invention relates -to the preparation of concrete or similar materials and, more particularly, to a portable apparatus for transporting and mixing concrete well suited for small jobs.
BACKGROUMD _F TH~ INVENTI~N
The mos-t popular method for transporting and mixing concrete consists of employing large cement trucks adapted to carry and mix subtantial quantities of concrete in the most efiicient manner. However, this type of equipment is ill suited for small concrete jobs which are normally carried out by mixing the concrete at the job site e:ither manually or by portable mixers. This process is time consuming because the transport of the cement from the supplier to the job site and the cement mixing operations are performed separately.
Another method to obtain concre~e for small applications is to rent a speclally designed trailer which is filIed with concrete mix at the plant and towed ko the ~5 construction site. The major problem with thls system is that once the trailer has been filled with concrete, the transportatiorl and the pouriny operations mu~t be performed rapidly before the concrete hardens. Thus, as a result of an unexpected delay duriny the transportation~
; 30 the concrete mix may not longer be usable when arriving at the job site and trailer cIeaning problems may arrise.
~.
~ 3 ~
- ~ .
O~JECTS_AND_STAT~MENT_OF_THF INVENTION
An ohject of the inven~ion is to provide a portable concrete mixing and transporta~ion device -that is both 5efficient and inexpensive to build.
Another object of the invention is a portable unit for transporting and mixing eoncreke ~Jith provisions to automatically discharge the concrete mix.
A further object of the invention is a trailer for 10transpor~ing and mixing concrete with provisions to prevent accidental concrete discharge as a result of changing ~he direction of rnovement of the trai:Ler.
The above objects are achieved by providing a trailer to be towed ~y a suitable vehicle, comprising a wheeled 15frame and a concrete mixing drum rotatably mounted to the frame. The drum is a generally hollow stru~ture with internal vanes arranged to mix the concrete while ~he drum rotates into one direction, and to discharge the concrete mix when the drum rotates into the opposite direction.
20A unidirectional drivi.ng connection between at least one of the trailer wheels and the mixiny drum causes rotation thereof in a corlcrete mixing clirection while the trailer advances, but prevents the drum to rotate in a concrete discharge direction when the trailer is moved in 25an opposite direction. Thls feature is particularly advantayeous because it permits to avoid accidental eoncrete discharge from the mixing drum when ths trailer is moved back.
To conveniently expel the concrete mix from the 30mixing drum at the construction site, the trailer is provided with a device that will drive the drum into the concrete discharge direction.
In a preferred embodiment, the wheels supporting ~he trailer frame on the ground surface are mounted to a 35common axle which also serves as a power take off for the ' ~3~6~
mixing drum. The opera-tive connection between the mixing drum and the axle is effected by means of a years and drive axles assembly incorporating a suitable ra~chet mechanism to prevent rotation of the mixiny tlrum when the trailer is moved backr but rotating the mix.ing drum when the trailer advances.
To discharye the concrete mix ~rom the drumr an electric motor is provided on the trailer, coupled to the drum through a chain and sprocket assembly, to rotate the latter in a concrete discharge direction.
Therefore, the present invention comprises~ in general terms, a trailer for transportiny and mixing concrete or similar products, comprising:
- a wheeled frame;
- a mixing drum mounted to the wheeled frame for rotation in a concrete mixing direction and in a concrete discharging dlrection;
- a unidirectional driving connection between a wheel of the frame and the mixing drum to cause rota~ion of the mixing drum solely in the concrete mixing direction as a result of movement of the wheeled frame; and - selectively actuakable driving means on the ~rame in operative relationshlp with the mix.ing drum for rotating the mixing drum in the drum di.sc!harcJing direction.
Other advantages and objects of the invention will become clear from the foll.owing description of ~ pre~erred embodiment of this invention.
BRI~F DESCRIPTION OF THE DRA~INGS
- Figure 1 is a top eIevational view of a portable concrete mixing and transportation device constructed in accordance with the invention;
~ 3 ~
- Figure 2 is a side elevational view, partly seetional of the concrete mixing device;
- Figure 3 is a bottom view of the concrete mixing device;
- Figure 4 is an enlarged perspective view of a ratchet mechanism used with the device in accordance with the invention;
- Figure 5 is a side eleva~ional view of the ratchet mechanism shown in Figure 4;
- Figure 6 is a cross-sectional view taken along lines 6-6 in Figure 5; and - Figure 7 is a perspective view of a hitch unit and levelling mechanism for the concrete mixing and transportation device~
DESCRIPTION OF A PR~FERRED EMBODIMENT
Referring now to the annexed drawings and, more particularly, to Figures 1, 2 and 3, the reference numeral 10 designates in general a portahle concrete mixing trailer designed to be towed by a car or any other suitable vehicle. The device 10 includes a frame 12 constructed from metallic beams welded or otherwise attached to each other. The frame 12 is supported on the ground by a pair of rubber tired wheels 14 moun~ed for rotation on a common axle 16. The axle 16 ls mounted to the metallic frame 1? by a leaf spriny suspension 18.
A concrete mixing drum 20 of a generally conventional construction is mounted on ~he frame 12. The drum 20 is a generally hollow cylindrical structurq wlth internal mixing vanes 22 extending spirally along the longitudinal axis of the drum.
A supportiny structure 24 is mounted at the rear of the frame 12 for holding the drum 20 at an angle with respect to the horizontal position. More particularly, :
~3~6~
the supporting structure 24 includes an upwardly extending post 26, secured to the frame 12 by means of a bracket 28, and carrying at its upper end a pair of rollers 29 (only one being shown) engaging the surface of the clrum 20 to the frame 12.
If desired, a concrete discharging chute may be provided (not-shown) on the frame 12, below the mouth of the drum 20.
The drum 20 is driven from the wheels 14 by a transmission 30 including an input shaft 32 interconnecti.ng the axle assembly 16 and a transfer case 34. From the trans~er case 34 extends an output shaft 36 connected to the drum 20. The shaft 36 incorporates a ratchet mechanism 38 to enable a uni-directional power transfer as it will be described hereinafter.
The connections between the drive shafts 32, 3~, the transfer case 34 and the axle assembly 16 are made means of universal joints covered by rubber boots 40 to ~eal against dirt or other foreign material.
The structure of the ratchet mechanism 38 is best illustrated in Figures 4, 5 and 6.
The ratchet mechanism 38 aomprises a circular plate 42 co-axial to a shaft 43 extending from the transfer case 34. On the plate 42 are provided two cams 44 at spaced locations from each other. Each cam 44 comprises a ramp 46 terminatin~ by an ahu~.ment 48.
A collar 50 is secured to one end of a shaft 52 co-axial with the shaft 43 and leading to the mixing drum 20.
The extremity of the collar 50, faciny the plate ~2, is provided with a socket of a generally ~cylindrical configuration Inot shown) ro~atably receiving a closely conforming pin (not shown) projecting from the plate 42.
This arrangement allows to provide rotatable connec~ion between the collar 50 and the plate 42.
~' , :: :~
6 ~
From the collar 50 project laterally two flanyes 54 and 56 clrilled to slidingly accept a pin 58 receiving a coil spring 60 maintained captive between the flanges 54 and 56. The extremity of the ~oil spring 60 adjacent the flanye 56 is secured by any appropriate means to the pin 5~ so as to urge the same toward the circular plate 42.
The extremity of the pin 58 opposite the plate 42 comprises a locking tab 62 for retracting the pin 58 from its position shown in Figure 4. The two possible pin positions are best illustrated in Figure 5. In full lines, the pin 58 is shown retracted, the locklng tab 62 abutting on the flange 54. In dashed lines, the locking tab 62 is rotated so as to clear the flange 54 allowing the pin to extend closer toward the circular plate 42.
The operation of the ratchet mechanism 38 is as follows. Assuming that the pin 58 is in the position shown in Figure 4 and the driving shaft 44 is rotated in the direction indicated by the arrow 6~, the flat circular plate 42 will rotate with respect to the collar 50 until the abutment 48 on one of the cams 44 engages the pin 58 causing rotation of the collar 50, the shaft 52 and consequently the drum 20 :about its longitudinal axis.
However, if the drive shaft 44 rotates in the opposite direction, as shown by the arrow 66, the pln 58 will engage the cams 44 by the ramps ~6 thereo, which will cause the pin 58 to reciprocate between the flanges 5~ and 56 without rotating the collar 50.
If the locking tab 62 is raised and placed agains~
the flange 54, no driving engagement can be produced : 30 between the circular plate 42 and the:collar 50 regardless of the direction of rotation of the driving shaft 43.
Referring back to ~igures 1 and 2, an electric motor 68 is mounted on the frame 12 to drive the mixing drum 20 for rotation about its longitudinal axis in the dire~tion shown by ~he arrow 70 in Flgure 1, ~o discharge the `
::
:~ : ~ : :
:
. , :
~ 3~6~
~oncre~e mix therefrom. Power transfer from ~he motor ~8 to the drum 20 is carried out through sprockets and a chain assembl~ 69. If desired, a reductor gear may also be used with the mo~or 68 to obtain the desired speed o~
rotation of the drum 20.
To connect the wheeled ~rame 12 to a pulling vehicle, a hitch and leveling assembly 74 is provided. As best illustrated in Figure 7, the assembly 74 comprises an elongated arm 76 pivotally moun~ed to the frame 12 at 78.
A rod 80 treadedly mounted to the frame 12 engages the arm 76 so as to adjust its angular position with respect to the frame 12.
From the arm 76 projects downwardly a supporting member 82 in the form of an angular bracket which engages the ground when the trailer 12 is clisconnected from the vehicle. It will be appreciated that rotating the rod ~0 in the appropriate direction, allows to adjust the anyular position of the frame 12 as desired.
The free extremity of the arm 76 is provided with a hitch unit 84 of conventional construction to effect the connection to the pulling vehicle.
The operation of the device 10 is as follows. The appropriate amount of cement,~ water or other suitahle material, is placed in the drum 20 and the hitch 74 is connected to the pulling vehicle. The vehicle is then driven at normal operating speeds to the job site. During the travel, the rotation of the wheels 14 will drive the mixlng drum 20 in the direction shown by the arrow 64, through the transmission 30, whereby the cement will be mixed and contained in the drum by the vanes 22.
If for whatever reasont the device 10 is moved ba~k, the ratchet 38 will disengage the shaft 52 from khe shaft 43 to prevent rotation of the drum 20 in a concrete discharge direction.
: :
' 13~1~6~
When the trailer is located where desired and the angular position of the frame 12 properly adjusted by means of ~he rod 80, the pi.n 58 of the ratchet me~hanism is placed into a retracted position to preve~t any driving engagement between the drum 20 and the wheels 14, and the electric motor 68 is connected into an electrica:L outlet so as to drive the drum 20 in a concrete discharging direction shown by the arrow 70. It will be appreciated that failure to completely deactivate the ratchet 38 will result into movement of the trailer 10 produced by the electric motor 68 driving the wheels 14 through the transmission normally used to rotate the drum 20.
It is understood that the above description of a preferred embodiment should not be interpretecl in any limiting manner because many variations and refinements are possible without departing from the spirit of the invention. The scope of the invention is defined in the annexed c~aiMs.
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Claims (4)
1. A trailer for transporting and mixing concrete or similar products, comprising:
- a wheeled frame;
- a mixing drum mounted to said wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from said drum;
- a unidirectional driving connection between a wheel of said frame and said mixing drum to cause rotation of said mixing drum solely in said first direction as a result of movement of said wheeled frame; and - selectively actuatable driving means on said frame in operative relationship with said mixing drum for rotating said mixing drum in said second direction.
- a wheeled frame;
- a mixing drum mounted to said wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from said drum;
- a unidirectional driving connection between a wheel of said frame and said mixing drum to cause rotation of said mixing drum solely in said first direction as a result of movement of said wheeled frame; and - selectively actuatable driving means on said frame in operative relationship with said mixing drum for rotating said mixing drum in said second direction.
2. A trailer as defined in claim 1, further including means to prevent a driving engagement between said driving means and a wheel of said wheeled frame during the operation of said driving means.
3. A trailer as defined in claim 1, including:
- transmission means between said wheel and said mixing drum; and - ratchet means in said transmission means to allow for power transfer from said wheel to said mixing drum only when said wheeled frame moves in a predetermined direction.
- transmission means between said wheel and said mixing drum; and - ratchet means in said transmission means to allow for power transfer from said wheel to said mixing drum only when said wheeled frame moves in a predetermined direction.
4. A trailer as defined in claim 3, wherein said drive means include an electric motor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000604188A CA1311468C (en) | 1989-06-28 | 1989-06-28 | Portable concrete mixer |
| US07/396,174 US5039226A (en) | 1989-06-28 | 1989-08-21 | Portable concrete mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000604188A CA1311468C (en) | 1989-06-28 | 1989-06-28 | Portable concrete mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1311468C true CA1311468C (en) | 1992-12-15 |
Family
ID=4140268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000604188A Expired - Lifetime CA1311468C (en) | 1989-06-28 | 1989-06-28 | Portable concrete mixer |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5039226A (en) |
| CA (1) | CA1311468C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348387A (en) * | 1992-11-18 | 1994-09-20 | Gordon Dale F | Auxiliary bearing and drive mechanism for a concrete mixer |
| US6299380B1 (en) * | 1998-08-20 | 2001-10-09 | Paul E. Bracegirdle | Process for treating dredge detritus |
| US20030221399A1 (en) * | 2002-05-31 | 2003-12-04 | Hall Glenn A. | Changeable power implements |
| DE202009001045U1 (en) * | 2009-01-28 | 2010-07-22 | Liebherr-Mischtechnik Gmbh | Truck mixer |
| GB2468634A (en) * | 2009-02-03 | 2010-09-22 | Raymond Forsey | Portable cement mixer with screw blade |
| EP2719510B1 (en) | 2012-10-11 | 2019-05-08 | Mulder Europe B.V. | Method for operating a mixer vehicle. |
| CN107571402B (en) * | 2017-10-20 | 2022-12-06 | 北京市市政工程研究院 | Drum-type sleeve agitating unit that is in milk |
| WO2019232192A1 (en) * | 2018-05-30 | 2019-12-05 | Amerapex NDT LLC | Parallel tube inspection system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US624200A (en) * | 1899-05-02 | fisher | ||
| US977679A (en) * | 1910-03-09 | 1910-12-06 | Frank D Robbins | Combined mixer and carrier. |
| US2176874A (en) * | 1938-05-17 | 1939-10-24 | John Dee St | Concrete mixing wheelbarrow |
| US2328343A (en) * | 1941-05-31 | 1943-08-31 | Thomas H Jacob | Adjustable trailer hitch |
| US2507077A (en) * | 1947-11-14 | 1950-05-09 | George A Williams | Portable concrete mixer and drive means therefor |
| US2816535A (en) * | 1955-11-30 | 1957-12-17 | Maurice G Wordingham | Coupling device |
| US3195362A (en) * | 1960-10-05 | 1965-07-20 | United Gas Corp | Unidirectional step clutch |
| US3326537A (en) * | 1965-11-26 | 1967-06-20 | James S Wallace | Transit concrete mixer |
| US3830522A (en) * | 1973-01-17 | 1974-08-20 | P Boucher | Adjustable trailer tongue |
| US3843163A (en) * | 1973-02-05 | 1974-10-22 | W Hale | Adjustable trailer hitch |
| US4078263A (en) * | 1977-04-11 | 1978-03-07 | Campbell Lloyd F | Manually operated mobile mixer |
| US4387995A (en) * | 1981-05-07 | 1983-06-14 | Routson Edwin J | Portable concrete mixing and transport apparatus |
-
1989
- 1989-06-28 CA CA000604188A patent/CA1311468C/en not_active Expired - Lifetime
- 1989-08-21 US US07/396,174 patent/US5039226A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5039226A (en) | 1991-08-13 |
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